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2 years ago

Please solve this question

Mathematics

1 answer:

blsea [12.9K]2 years ago

8 0

Answer:

x = 269/15

Step-by-step explanation:

(3x - 5) / 6 - (4 + x) / 7 = 5

7(3x - 5) - 6(4 + x) = 5(42)

21x - 35 - 24 - 6x = 210

15x - 59 = 210

15x = 269

x = 269/15

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3 years ago

Read 2 more answers

Can someone please help <br> ill give you a brainlist

posledela

Answer:

y = -3x - 6

Step-by-step explanation:

Your y-intercept is given as b = -6

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3 years ago

Find -4A+8B (Picture provided)

Anarel [89]

Answer:

Option C

Step-by-step explanation:

We are given two matrices A and B and we have to calculate the value of the expression -4A + 8B. Each element of matrix A will be multiplied by -4 and each element of matrix B will be multiplied by 8. The corresponding elements of the resulting matrices will be added.

$-4A+8B=-4\times\left[\begin{array}{ccc}-4&-4&1\\1&4&7\\2&3&3\end{array}\right] +8\times\left[\begin{array}{ccc}2&9&-9\\8&8&-2\\4&10&1\end{array}\right] \\\\\\ -4A+8B=\left[\begin{array}{ccc}16&16&-4\\-4&-16&-28\\-8&-12&-12\end{array}\right] +\left[\begin{array}{ccc}16&72&-72\\64&64&-16\\32&80&8\end{array}\right]\\\\ \\ -4A+8B=\left[\begin{array}{ccc}32&88&-76\\60&48&-44\\24&68&-4\end{array}\right]$

Therefore, option C gives the correct answer.

8 0

3 years ago

Work out the surface area of this sphere.<br> Give your answer to 1 decimal place.

bearhunter [10]

Answer:

452.4

Step-by-step equation:

surface area of a sphere formula= 4πr²

plug 6 in for r

4π(6)² =452.389 rounded to 452.4

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3 years ago

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Answer:

four days: 320 pence

seven days: 560 pence

Step-by-step explanation:

Multiply the cost by the number of days.

80 pence× 4 days= 320 pence

80×4=320

80×7=560

3 0

3 years ago